Help fast please gotta make it to the track "timing question"

[Dark_5.0]

I had this guy set my timing a week ago and I dont know if he knew what he was doing or not.

Sometimes now my car does not want to start and when I turn the car off it tries to stay running.

Isnt this the symptoms of retarded timing.

and wouldnt this explain my low MPH in the quarter

I have a timing light can someone please tell me step by step how to accurately advance my timing. Im trying to make it to the track tonight so quick responses would be greaytly appreciated.

Thanks in advance


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88 mustang gt convertible bored to 306 BBk equal length headers mac cold air fender kit 3.73 FMS gears cowl hood nitto drag radials ford racing clutch flow masters h-pipe 160* thermostat 16 degrees of timing electric fan off 94' t-bird jacobs electronics cap and wires. Edelbrock 1 1/2 inch drop springs.